[. . . ] Touching the internal parts of the camera or lens could result in injury. Should the camera or lens break open as the result of a fall or other accident, take the product to a Nikonauthorized service representative for inspection after unplugging the product and/or removing the battery. [. . . ] fF= Exposuremeasurementnotpossible; teleconverter/screen combination permits only focusing operation. Since type M screen can be used for both macro photography at a 1:1 magnification ratio or higher and for photomicrography, it has different applications than other screens. When removing the lens from the camera body to attach the teleconverter, make sure that the camera's power is turned off and avoid direct sunlight. to attach Attach the teleconverter to the lens so that the teleconverter's lens mounting index is aligned with the aperture index on the lens. Taking care not to press the lens release lever, turn the teleconverter counterclockwise (with the lens facing away from you) until it clicks into place. To remove Slide back the teleconverter's lens release lever and turn the teleconverter clockwise (with the lens facing away from you) until the teleconverter's lens mounting index is aligned with the lens' mounting index. Make sure that the camera's power is turned off and avoid direct sunlight. to attach Attach the camera to the lens/teleconverter assembly so that the camera's mounting index is aligned with the teleconverter-camera index on the teleconverter. Taking care not to press the camera's lens release button, turn the camera body counterclockwise (with the camera body facing away from you) until it clicks into place. ) To remove Whilepressingthelensreleasebuttononthecamera body, turn the camera body clockwise (with the camera body facing away from you) until the teleconverter-camera index is aligned with the camera's lens mounting index. [. . . ] 7 elements in 5 groups (1 aspherical lens) Fully automatic Via full-aperture method with AI cameras or cameras having a CPU; via stop-down method for other cameras Front: Special mount for AF-S/AF-I NIKKOR lens Rear: Nikon bayonet mount Approx. With a prime lens Focal length: Double that of a prime lens Aperture coupling range: f/2 - f/32 (effective aperture f/4 - f/64) Reproduction ratio: Double that of a prime lens Depth of field: 1/2 that of a prime lens Minimum focusing distance: Same as that of a prime lens Specifications and designs are subject to change without notice or obligation on the part of the manufacturer. [. . . ]